/***************************************************************************
*                                Movement.cs
*                            -------------------
*   begin                : May 1, 2002
*   copyright            : (C) The RunUO Software Team
*   email                : info@runuo.com
*
*   $Id: Movement.cs 644 2010-12-23 09:18:45Z asayre $
*
***************************************************************************/

/***************************************************************************
*
*   This program is free software; you can redistribute it and/or modify
*   it under the terms of the GNU General Public License as published by
*   the Free Software Foundation; either version 2 of the License, or
*   (at your option) any later version.
*
***************************************************************************/

using System;

namespace Server.Movement
{
    public static class Movement
    {
        private static IMovementImpl m_Impl;

        public static IMovementImpl Impl
        {
            get
            {
                return m_Impl;
            }
            set
            {
                m_Impl = value;
            }
        }

        public static bool CheckMovement(Mobile m, Direction d, out int newZ)
        {
            if (m_Impl != null)
                return m_Impl.CheckMovement(m, d, out newZ);

            newZ = m.Z;
            return false;
        }

        public static bool CheckMovement(Mobile m, Map map, Point3D loc, Direction d, out int newZ)
        {
            if (m_Impl != null)
                return m_Impl.CheckMovement(m, map, loc, d, out newZ);

            newZ = m.Z;
            return false;
        }

        public static void Offset(Direction d, ref int x, ref int y)
        {
            switch ( d & Direction.Mask )
            {
                case Direction.North:
                    --y;
                    break;
                case Direction.South:
                    ++y;
                    break;
                case Direction.West:
                    --x;
                    break;
                case Direction.East:
                    ++x;
                    break;
                case Direction.Right:
                    ++x;
                    --y;
                    break;
                case Direction.Left:
                    --x;
                    ++y;
                    break;
                case Direction.Down:
                    ++x;
                    ++y;
                    break;
                case Direction.Up:
                    --x;
                    --y;
                    break;
            }
        }
    }

    public interface IMovementImpl
    {
        bool CheckMovement(Mobile m, Direction d, out int newZ);

        bool CheckMovement(Mobile m, Map map, Point3D loc, Direction d, out int newZ);
    }
}